Execute shouldn't really be overriden because it handles a very touchy
case: module (un)installs, if it is poorly overriden it can create
registry inconsistencies and can make databases crash in really dumb
ways, since the module operations *need* to be performed at the end of
the transaction (last).
Most of the time, an override of set_values() does the same job and is
much safer.
This commit updates the `res.config.settings.execute()` documentation to
reflect this.
closesodoo/odoo#56032
Signed-off-by: Raphael Collet (rco) <rco@openerp.com>